<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>SSE</title>
</head>
<body>
<div id="sse">
  <script>
    let eventSource = new EventSource("/sse/retry");
    eventSource.onmessage = function(event){
      document.getElementById("sse").innerHTML= event.data;
    }
  </script>
</div>
</body>
</html>